18 Summary Two components on the lightcurves:Quasi steady X-ray intensities enhanced when AR are presentThe lowest quasi-steady state level, when no AR are present, is also observed in D2, this level is still fluctuating on a 5 min time scale study is in progress.Flares are seen on-top of this basal variability.Flare „enhancements” are being detected from amplitudes above ~ 0.05 dex.Both short and LDE types of events are present „without the sunspots”The Sun is the weakest X-ray star within 7 parsecs (Schmitt et al., 1995, ApJ, 450, 392)with our new estimated luminosity at LX = 1.3 × 1018 W 100 x less α Cen A., 47 x less previous estimates (Judge et al., 2003, ApJ, 593, 534)Luminosity in the 1—300 Å is 8.0 × 1025 erg s-1, a value which is of interest for heating the Earth’s atmosphere, much below present estimatesThermal energy content of the solar corona is 2 × 1030 ergXXXIV Zjazd PTA Kraków , Solar Session, 15 September Janusz Sylwester